PMMH, UMR 7636 CNRS-ESPCI-Université Paris 6-Université Paris 7, Paris, France.
Phys Rev Lett. 2012 Aug 10;109(6):064502. doi: 10.1103/PhysRevLett.109.064502.
We study the compression of viscous filaments at constant velocity. If slender enough, the filament bends, a viscous analogue of Euler elastic buckling. We measure the characteristic time of this viscous buckling and discuss the link with the elastic critical compression. We show that the analogy only holds in the limit of large capillary numbers. Otherwise capillarity has a stabilizing effect, which suppresses buckling.
我们研究了在恒定速度下粘性细丝的压缩。如果足够细长，细丝会弯曲，这是粘性的欧拉弹性屈曲的类似物。我们测量了这种粘性屈曲的特征时间，并讨论了它与弹性临界压缩的联系。我们表明，只有在大毛细数的极限下，这种类比才成立。否则，毛细作用具有稳定作用，抑制了屈曲。
